What are the 3 common states in which water can exist?
What are solid, liquid, and gas?
100
Water makes up this percentage of your body.
What is 70%
100
These insoluble ions form scales on pipes and fixtures.
What are Magnesium and Calcium?
100
In the electrolysis experiment, there should have been twice as much of this gas.
What is hydrogen?
200
A charged molecule or atom
What is an ion?
200
Does frozen alcohol sink or float?
What is sink?
200
Water can dissolve nearly everything...well, a lot of things, which have these properties:
What are polar and ionic compounds?
200
If you do not have any water, you will die in as many days as there are atoms in a single water molecule, which is:
What is 3?
200
How many atoms are in 2 molecules of NaHCO3?
What is 12 atoms?
300
An molecule with an uneven distribution of charges
What is a polar molecule?
300
This name of this process comes from the Greek word lusis which means "to loosen or set free."
What is electrolysis?
300
Kool-aid is soluble in water making it what component of a solution?
What is the solute?
300
Water in our area is some of the "hardest" in the U.S. due to the presence of this compound: CaCO3, also called:
What is calcium carbonate or limestone...or chalk.
300
True or false? Hydrogen steals protons from the oxygen in a water molecule and is therefore more positively charged.
What is false.
400
These weak interactions are responsible for the surface tension of water.
What are hydrogen bonds?
400
Would there be more molecules in a liter of liquid or a liter of ice?
What is a liter of liquid?
400
Gases, including oxygen, dissolve in water allowing these animals to breathe.
What are fish?
400
When we are first born, our lungs are little flattened sacs that sometimes need help from these compounds to overcome water's cohesive forces and inflate.
What are surfactants?
400
True or false? A hydrogen bond is a bond between hydrogen and oxygen within a water molecule.
What is true?
500
This is the density of water.
What is 1 gram per milliliter?
500
Can you make water evaporate without adding heat?
Place the water in a vacuum.
500
H2S, H2Se, and H2Te are the chemicals most like water, but they still so different that they are found in this state at room temperature.
What is the gas state?
500
Why can you simply not remove hard water ions from hard water?
Eventually the prevalence of negative charge will make it nearly impossible to remove the few remaining positively charged ions.
500
These compounds are used to break the surface tension of water.